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GeForce 8800 GTS (G80) 640MB vs GeForce 9800 GTX+

Intro

The GeForce 8800 GTS (G80) 640MB features a core clock frequency of 513 MHz and a GDDR3 memory frequency of 792 MHz. It also uses a 320-bit memory bus, and makes use of a 90 nm design. It is comprised of 96 SPUs, 48 Texture Address Units, and 20 ROPs.

Compare that to the GeForce 9800 GTX+, which has GPU clock speed of 738 MHz, and 512 MB of GDDR3 memory set to run at 1100 MHz through a 256-bit bus. It also is comprised of 128 Stream Processors, 64 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 640MB 143 Watts
GeForce 9800 GTX+ 145 Watts
Difference: 2 Watts (1%)

Memory Bandwidth

In theory, the GeForce 9800 GTX+ will be 11% quicker than the GeForce 8800 GTS (G80) 640MB overall, because of its higher data rate. (explain)

GeForce 9800 GTX+ 70400 MB/sec
GeForce 8800 GTS (G80) 640MB 63360 MB/sec
Difference: 7040 (11%)

Texel Rate

The GeForce 9800 GTX+ will be a lot (more or less 92%) faster with regards to texture filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

GeForce 9800 GTX+ 47232 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 22608 (92%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 9800 GTX+ is the winner, but only just. (explain)

GeForce 9800 GTX+ 11808 Mpixels/sec
GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
Difference: 1548 (15%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce 8800 GTS (G80) 640MB

Amazon.com

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GeForce 9800 GTX+

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 8800 GTS (G80) 640MB GeForce 9800 GTX+
Manufacturer nVidia nVidia
Year Nov 2006 (640) July 2008
Code Name G80 G92b
Memory 640 MB 512 MB
Core Speed 513 MHz 738 MHz
Memory Speed 1584 MHz 2200 MHz
Power (Max TDP) 143 watts 145 watts
Bandwidth 63360 MB/sec 70400 MB/sec
Texel Rate 24624 Mtexels/sec 47232 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 11808 Mpixels/sec
Unified Shaders 96 128
Texture Mapping Units 48 64
Render Output Units 20 16
Bus Type GDDR3 GDDR3
Bus Width 320-bit 256-bit
Fab Process 90 nm 55 nm
Transistors 681 million 754 million
Bus PCIe x16 PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

GeForce 9800 GTX+

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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